Changes of NDVI in Different Areas of Shaanxi Province and Its Responses to Climate Factor

PU Lei; REN Zhi-yuan

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Changes of NDVI in Different Areas of Shaanxi Province and Its Responses to Climate Factor

- Changes of NDVI in Different Areas of Shaanxi Province and Its Responses to Climate Factor
- Bulletin of Soiland Water Conservation Vol. 32, Issue 2, Pages: 265-269(2013)
- 作者机构：
  
  陕西师范大学旅游与环境学院,陕西,西安,710062
- 作者简介：
- 基金信息：
- DOI：
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- Published：2013
- 稿件说明：
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PU Lei, REN Zhi-yuan. Changes of NDVI in Different Areas of Shaanxi Province and Its Responses to Climate Factor[J]. Bulletin of Soiland Water Conservation, 2013, 32(2): 265-269.
DOI：

PU Lei, REN Zhi-yuan. Changes of NDVI in Different Areas of Shaanxi Province and Its Responses to Climate Factor[J]. Bulletin of Soiland Water Conservation, 2013, 32(2): 265-269. DOI：

摘要

利用SPOT VEGETATION数据分别研究了陕西省近10a植被空间分布和动态变化

比较了陕南、关中和陕北地区植被NDVI的年际变化和月变化。结果表明

陕西省植被覆盖总体较好

各地区植被总体轻微改善。这3个地区的植被NDVI年均值均逐年增加

并且增长速度表现为:陕南>关中>陕北

不同地区植被夏季生长最好。通过对不同地区植被NDVI与气温、降水、日照时数的年际和年内相关关系及其响应的研究得出

不同地区植被NDVI与气温、降水、日照时数的年际相关性不大

而年内相关性显著。研究了不同地区植被NDVI对气温、降水、日照时数的滞后效应得出

陕南地区植被NDVI对气温降水的响应不具有滞后性

对日照时数的响应具有滞后性。关中和陕北地区植被NDVI对气温、日照时数的响应具有滞后性

对降水的响应具有即时性。

Abstract

The spatial distribution and dynamic changes of vegetation in Shaanxi Province were analyzed using SPOTVEGETATION data for recent ten years.The NDVI values of different regions including the southern

Guanzhongand the northern areas were compared in regard to annual and monthly variations.It was showed that ShaanxiProvince had good vegetation coverage that improved slightly as a whole during the past years.Annual average NDVI of the three regions were increasing each year

with increasing rates of the southern area>Guanzhong area>the northern area.By comparison

we found the vegetation NDVI had significant monthlyand less significant annual correlations with temperature and precipitation in different areas.The responsesvegetation NDVI showed no significant time lag to temperature and precipitation and exhibited noticeable lagto sunshine variations in Southern Shaanxi area.In Guanzhong and Northern Shaanxi area

in the response ofNDVI was found one month of time lag to temperature and sunshine lagged while no lag to precipitation.

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